First, huge props to Matt Klein (ScramFam) for having the initial idea that got all this going and for having saved off the initial pictures we took to JCR to design ours. I'm REALLY glad he gave me reason to finally get my act together and do this.
Randy, those were the things I was thinking on the glovebox (though not the spring hinge, that's interesting). I feel like I saw someone who added some wire to the hinges so that the door actually slid over to the side after you opened it to come out from behind the cage. I'll get the door off today and look at the options.
jeffs, I saw John N's custom dash and that's exactly what I was thinking. This is also part of why I wasn't worried about them chopping on this dash (the didn't end up needing to) to make my A-pillar mount work.
I need to go through and tack a bunch of nuts to the mounting plates and add lockwashers elsewhere. I didn't have a problem with those nuts driving it home yesterday, but I bet you're right. Just flipping them over so the heads are up would be fine. I want the grade 8 stuff there.
Karma,

I got a LOT of looks and double/triple-takes on the highway coming home. It's one thing for people to notice when you're driving on the right, but it's completely obvious when there isn't even a SEAT on the left.
TX, I forget the exact dimensions on the tube. All DOM. I think they're just set up for MIG and for this application, I don't think that's any problem at all. Only times I think TIG is a big deal is when you're going for the very prettiest welds possible or using more exotic materials and neither was the case here. There's some very pretty welds on this though, I have to say.